<?php function formatPhoneNumber($phoneNumber) { // Remove all non-digit characters $phoneNumber = preg_replace('/\D/', '', $phoneNumber); // Add formatting based on your desired format return str_replace(['000', '111', '222', '333', '444', '555', '666', '777', '888', '999'], ['(', ') ', '-'], $phoneNumber); } // Test the function $phoneNumber = "123-456-7890"; $formattedNumber = formatPhoneNumber($phoneNumber); echo "Formatted Phone Number: " . $formattedNumber;